make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

net/socket/tcp_socket_win.h

Index: net/socket/tcp_socket_win.h
diff --git a/net/socket/tcp_socket_win.h b/net/socket/tcp_socket_win.h
index df5fbf09aecc9bd29ca802be3797fd2650a26f80..f886d33c14ed4710b23f38e34d662c98d2d9a0c0 100644
--- a/net/socket/tcp_socket_win.h
+++ b/net/socket/tcp_socket_win.h
@@ -63,8 +63,8 @@ class NET_EXPORT TCPSocketWin : NON_EXPORTED_BASE(public base::NonThreadSafe),
   // - SetKeepAlive(true, 45).
   void SetDefaultOptionsForClient();
   int SetExclusiveAddrUse();
-  bool SetReceiveBufferSize(int32 size);
-  bool SetSendBufferSize(int32 size);
+  int SetReceiveBufferSize(int32 size);
+  int SetSendBufferSize(int32 size);
   bool SetKeepAlive(bool enable, int delay);
   bool SetNoDelay(bool no_delay);